Hi Blu- sounds like we have some similar issues. I've been riding a Trek hybrid for about 2 years averaging 13-14 mph and riding usually 30-45 miles at a time (with a coupla 50s). I only ride on the weekend and I haven't done any group rides.

A couple weeks ago I picked up my new Cannondale road bike. I haven't done as much riding on it as I'd like, but looks like the average is about 15mph. Same as you - good cardio, strong legs, although haven't gone clipless yet.

I think it will be key to get in some group rides. With my competitive nature riding with someone - even one person - who is a stronger rider than me would probably do me a lot of good.

Wish I could offer some advice...but, I'm trying to figure out the same thing myself right now.